CVE-2023-3585

channel DoS by sharing a boards link

View on CVE.org

Published Jul 17, 2023 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Description

Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by posting a specially crafted boards link.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mattermost

Mattermost

unknown

Version	Status	Constraints
`0`	affected	≤ 7.8.6
`0`	affected	≤ 7.9.4
`0`	affected	≤ 7.10.2
`7.8.7`	unaffected	—
`7.9.5`	unaffected	—
`7.10.3`	unaffected	—

Configuration 1 [-]

OR	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::

No data.

No data available yet.

Remediation

Vendor Solution

Update Mattermost Server to versions v7.8.7, v7.9.5, v7.10.3 or higher.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2023-44235	Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by posting a specially crafted boards link.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.538% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://mattermost.com/security-updates

History

Oct 21, 2024 8:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Mattermost Mattermost Server

Weaknesses

CWE-400

Sources

CVE record Updated: Oct 21, 2024, 7:43 PM

Status: PUBLISHED
Assigner: Mattermost
Published: Jul 17, 2023, 3:24 PM
Updated: Oct 21, 2024, 7:43 PM
Reserved: Jul 10, 2023, 1:44 PM

View source JSON

Vulnrichment Updated: Aug 2, 2024, 7:01 AM

Updated: Aug 2, 2024, 7:01 AM

NVD Updated: Jun 17, 2026, 6:14 AM

Status: Modified
Published: Jul 17, 2023, 4:15 PM
Modified: Jun 17, 2026, 6:14 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-3585", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2023-07-10T13:44:28.891Z", "datePublished": "2023-07-17T15:24:20.975Z", "dateUpdated": "2024-10-21T19:43:02.507Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "7.8.6", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.9.4", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.10.2", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "7.8.7"}, {"status": "unaffected", "version": "7.9.5"}, {"status": "unaffected", "version": "7.10.3"}]}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Ossi V\u00e4\u00e4n\u00e4nen"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by <span style=\"background-color: rgb(255, 255, 255);\">posting a specially crafted boards link.</span></p>"}], "value": "Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by\u00a0posting a specially crafted boards link.\n\n"}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "CWE-400 Uncontrolled Resource Consumption", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2023-07-17T15:24:20.975Z"}, "references": [{"url": "https://mattermost.com/security-updates"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Update Mattermost Server to versions v7.8.7, v7.9.5, v7.10.3 or higher.</p>"}], "value": "Update Mattermost Server to versions v7.8.7,\u00a0v7.9.5,\u00a0v7.10.3 or higher.\n\n"}], "source": {"advisory": "MMSA-2023-00168", "defect": ["https://mattermost.atlassian.net/browse/MM-51713"], "discovery": "EXTERNAL"}, "title": "channel DoS by sharing a boards link", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:01:57.036Z"}, "title": "CVE Program Container", "references": [{"url": "https://mattermost.com/security-updates", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-10-21T19:42:37.907997Z", "id": "CVE-2023-3585", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-21T19:43:02.507Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://mattermost.com/security-updates", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:01:57.036Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-3585", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-21T19:42:37.907997Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-21T19:42:43.426Z"}}], "cna": {"title": "channel DoS by sharing a boards link", "source": {"defect": ["https://mattermost.atlassian.net/browse/MM-51713"], "advisory": "MMSA-2023-00168", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Ossi V\u00e4\u00e4n\u00e4nen"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Mattermost", "product": "Mattermost", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "7.8.6"}, {"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "7.9.4"}, {"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "7.10.2"}, {"status": "unaffected", "version": "7.8.7"}, {"status": "unaffected", "version": "7.9.5"}, {"status": "unaffected", "version": "7.10.3"}], "defaultStatus": "unknown"}], "solutions": [{"lang": "en", "value": "Update Mattermost Server to versions v7.8.7,\u00a0v7.9.5,\u00a0v7.10.3 or higher.\n\n", "supportingMedia": [{"type": "text/html", "value": "<p>Update Mattermost Server to versions v7.8.7, v7.9.5, v7.10.3 or higher.</p>", "base64": false}]}], "references": [{"url": "https://mattermost.com/security-updates"}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}, "descriptions": [{"lang": "en", "value": "Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by\u00a0posting a specially crafted boards link.\n\n", "supportingMedia": [{"type": "text/html", "value": "<p>Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by <span style=\"background-color: rgb(255, 255, 255);\">posting a specially crafted boards link.</span></p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-400", "description": "CWE-400 Uncontrolled Resource Consumption"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2023-07-17T15:24:20.975Z"}}}, "cveMetadata": {"cveId": "CVE-2023-3585", "state": "PUBLISHED", "dateUpdated": "2024-10-21T19:43:02.507Z", "dateReserved": "2023-07-10T13:44:28.891Z", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "datePublished": "2023-07-17T15:24:20.975Z", "assignerShortName": "Mattermost"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "7.8.6", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.9.4", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.10.2", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "7.8.7"}, {"status": "unaffected", "version": "7.9.5"}, {"status": "unaffected", "version": "7.10.3"}]}], "source": "responsibledisclosure@mattermost.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "5CE365D7-09E6-424C-A8FE-B7BDCC76B749", "versionEndExcluding": "7.8.7", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "B0D66512-A095-4557-A9AD-B02E306FC1C9", "versionEndExcluding": "7.9.5", "versionStartIncluding": "7.9.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "401CC11A-1059-44A2-87BA-601024BD178E", "versionEndExcluding": "7.10.3", "versionStartIncluding": "7.10.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by\u00a0posting a specially crafted boards link.\n\n"}], "id": "CVE-2023-3585", "lastModified": "2026-06-17T06:14:24.403", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "responsibledisclosure@mattermost.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-3585", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-21T19:42:37.907997Z", "version": "2.0.3"}}]}, "published": "2023-07-17T16:15:10.633", "references": [{"source": "responsibledisclosure@mattermost.com", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/security-updates"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/security-updates"}], "sourceIdentifier": "responsibledisclosure@mattermost.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "responsibledisclosure@mattermost.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "nvd@nist.gov", "type": "Primary"}]}